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Subject[PATCH 38/62] i2c: convert to idr_alloc()
Date
Convert to the much saner new idr interface.

Only compile tested.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
---
This patch depends on an earlier idr changes and I think it would be
best to route these together through -mm. Please holler if there's
any objection. Thanks.

drivers/net/macvtap.c | 21 +++++----------------
1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 0f0f9ce..2497f6f 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -279,28 +279,17 @@ static int macvtap_receive(struct sk_buff *skb)
static int macvtap_get_minor(struct macvlan_dev *vlan)
{
int retval = -ENOMEM;
- int id;

mutex_lock(&minor_lock);
- if (idr_pre_get(&minor_idr, GFP_KERNEL) == 0)
- goto exit;
-
- retval = idr_get_new_above(&minor_idr, vlan, 1, &id);
- if (retval < 0) {
- if (retval == -EAGAIN)
- retval = -ENOMEM;
- goto exit;
- }
- if (id < MACVTAP_NUM_DEVS) {
- vlan->minor = id;
- } else {
+ retval = idr_alloc(&minor_idr, vlan, 1, MACVTAP_NUM_DEVS, GFP_KERNEL);
+ if (retval >= 0) {
+ vlan->minor = retval;
+ } else if (retval == -ENOSPC) {
printk(KERN_ERR "too many macvtap devices\n");
retval = -EINVAL;
- idr_remove(&minor_idr, id);
}
-exit:
mutex_unlock(&minor_lock);
- return retval;
+ return retval < 0 ? retval : 0;
}

static void macvtap_free_minor(struct macvlan_dev *vlan)
--
1.8.1


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